<!DOCTYPE html>
<html>
<head lang="en">
    <meta charset="UTF-8">
    <title></title>
</head>
<style>details details{padding: 15px}</style>
<body>
<details>
    <summary>交互</summary>

    <details>
        <summary>内容交互</summary>
        <p>details与summary元素</p>
    </details>
</details>
</body>
</html>